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Note 6 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		9 Months Ended
	Aug. 06, 2018	Sep. 30, 2019	Sep. 30, 2018	Nov. 08, 2017
Maximum Aggregate Offering Price				$ 200,000
Stock Issued During Period, Shares, New Issues	10,455
Shares Issued, Price Per Share	$ 5.50
Proceeds from Issuance of Common Stock	$ 53,400		$ 53,400

X

- Definition

Represents the maximum aggregate offering price of common stock, preferred stock, depository shares, stock purchase contracts, warrants and units.

+ References

No definition available.

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X

- Definition

The cash inflow from the additional capital contribution to the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585

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X

- Definition

Per share or per unit amount of equity securities issued.

+ References

No definition available.

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X

- Definition

Number of new stock issued during the period.

+ References

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-SubTopic 10
-Section S99
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